Arch supporting siphon



Feb. 21, y1939. c. G, HAWLEY ARCH SUPPORTING SIPHON 2 Sheets-Sheet 1`Filed Apm 12, 1957 @M f WMM? @mags 4 Feb. 21, 1939, c. G. HAWLEY ARCHSUPPORTING SIPHON 2 shee1s-shee1f 2 Filed April 12, 1937 3mm/vtm CharesHaurley.

Patented Feb. 21, 1939 ITE-o Asrm,Es

PATE-Nr oli-FICE ARCHSUR-PORTINGISIPHON' Charles -GilbertHawley,Chicago, 111.,.assignor, by mesne, assignments, ,to Downflow Syphon Com-.K pany, Cleveland, Oliioa corporation of Ohio;

. `Application,April 12, 193.7.;.SerialzNoa136,488*- This-inventionrelates to` improvements in r and for the water-steaming-and-circulatingsiphons thatoccupylongitudina1,i` vertical positions in locomotivereboxes and which are called upon to support wholly or in part therefractory brick that compose a nre-box arch. The invention has furtherand special reference to siphons of the U-shaped downow type describedand claimed in my allowed application S. N. 82,953.

The invention consists first, in a thermic siphon of U-shapedcross-section and specially formed to aid in the distribution of waterwithin the siphon and to support arch brick upon the exterior of thesiphon. And, second, the invention consists in arch brick of specialformation, complementary to the described special thermic siphon.

The invention will be readily understood upon reference to theaccompanying drawings, which form parts of this specication, and inwhich:

Fig. 1 is a vertical, longitudinal section of a locomotive boiler andrebox constructed and equipped in accordance with this invention; Fig. 2is a vertical cross-section on the line 2 2 of Fig.

l; Fig. 3 is an enlarged cross-sectional detail taken from one of thesiphons of Fig- 2, and better illustrating the present invention.

The construction of the exemplary boiler and rebox exhibited here is toowell known to require extensive description.

'I'he firebox 2 is of the internal, stayed type common to locomotiveboilers. Its fuel door is marked 3 and the fuel bed or re is marked 4.'Ihe gases rise within the box and sweep forward, departing through theflues 5. The thermic siphons, so-called, are marked 6, two being shown.The siphons here exhibited and to which the present inventionparticularly appertains, are f the downow type that take water from the40 rear water leg l of the boiler and deliver water and steam throughthe crown sheet 8 and into the steam space S.

These downiiow siphons are described and claimed in my said applicationS. N. 82,953, and

areL more speciiically described and claimed in my companion applicationentitled Downiiow siphons, of even date herewith.

Such siphons are thin hollow water walls that divide the upper part ofthe fire chamber 2 into several parts; and, to increase the flame travelfrom fuel bed to flues it is common to equip the rebox with an inclinedrefractory baille, called an arch. The name travel is shown by arrows inFig. 1.

The present invention is concerned with a specifically. novelconstruction and support for that` arch: the arch` in.` associationwith; the siphons being:broadly-claimedfinzsaid `companion applicationentitled Downlow siphons.

First to be noted is a cross wall 9, which is lodged within thecombustion chamber portion I0 of the firebox. That wall has verticalnotches which accommodate the lower, forward parts of the siphons 6. Thearch proper extends upwardly and rearwardly from the wall 9 and iscomposed 10 of specially shaped brick Il which extendcross- Wise of therebox, from siphon to Siphon, and from siphons to rebox side sheets; allnding special supports upon said siphons. Those supports are provided bygrooved portions 6 of the 15 siphons, into which the ends of the brickIl fit, as well shown in Fig. 2 and as fully detailed in Fig. 3.

All brick used in making up the wall I0 and the arch proper are of sizeswhich permit them to be carried into the iirebox through the fuel door3.

Referring to Fig. 3, it will be seen that the hollow wall or siphon iscomposed of spaced apart side sheets 6a, which are joined by many shortstaybolts I2. At the bottom the sheets are joined in the U-shapedsection 6b; which forms the closed bottom of the wall or siphon. At thatpoint the sheets 6a are united by a fusion weld 6c. The rear end 6a ofeach Siphon is similarly made. If desired, the entire siphon can be madeby folding a single sheet, thereby avoiding the bottom weld 6c, but itis more convenient to make the siphon as here shown.

The upper parts of the sheets Ga, and end portions are flared out toform the flanged top, 6d. As is common the flaring top of the siphon isunited with the crown sheet 8 by butt welds 8a. The whole crown sheet issupported by crown bolts I3 and certain thereof are fastened in theflanges 6d of the Siphon, to more securely support that 40 part with andfrom the crown sheet.

Special novelty attaches to the grooves E', which are here provided inthe side sheets 6a; and also resides in the restricted longitudinalsiphon throat 6x, which is formed by the inwardly ex- 45 tended orgrooved parts G. Most conveniently, the grooves 6' areformed by pressingor stamping the sheets before they are formed into the Siphon body, andthose grooves extend longitudinauy of the Siphon s, parauei with thebottom of 5 thesiphon, as well shown in Fig. 1.

The inclined portion of the brick arch extends only part Way toward therear end of the siphons and the grooves 6 need not be longer than the uarch, though it is admissible to extend the grooves from end to end ofthe siphon.

Obviously, the lower sides of the grooved por tions 6' provide shouldersupon which the ends of the brick II may rest; and hereunder each brick II is provided with a complementary end rib IIa, preferably extendingfrom end to end of the brick.

The brick II occupy inclined transverse positions, as well shown in Fig.2 and are assembled as there shown. By preference, the free ends of thebrick are provided with interlocking parts IIb, to prevent disengagementafter the brick are assembled as shown.

As explained, the water enters each siphon through its rear end, passingdownward along the bottom 6a thereof. During operation water isevaporated very rapidly within the Siphon and it is a distinct advantagethat the lower part of the siphon is converted into a water conduitleading to the lower corner of the siphon; and, that the constrictedlongitudinal throat 6x controls the rise of water and steam from thelower part of the siphon, thus ensuring a good distribution of boththroughout the siphon.

Attention is called to the fact that if the Siphon is to be made with alongitudinal bottom Weld 6c as shown in Fig. 3, it would be better todispense with the threaded and headed staybolts I2 herein shown and tosubstitute therefor welded stays, after the manner set `forth andclaimed in my companion application of this date, entitled Thermicsiphons and the like.

I claim:

l. A locomotive rebox siphon comprising a longitudinal water wall havinga brick supporting recess or groove formed in its side.

2. The structure as claimed in claim 1, in combination with refractorybrick having end ribs, complementary to said groove.

3. The structure as claimed in claim 1 and having one such groove ineach of its sides, said grooves being opposite and thus presenting aconstricted internal throat, as and for the purpose specified.

CHARLES GILBERT HAWLEY.

